JPS6236128A - Fishing tool material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to fishing gear, particularly fishing nets, as well as rope materials.

More specifically, the present invention relates to a novel fishing gear material that is non-toxic to fish and can maintain antifouling activity for a long period of time.

In the fishing nets and fixed nets that have become popular in recent years, the fishing nets must be immersed in seawater for a long period of time. Because it adheres to the ropes that form and blocks the nets, seawater movement becomes insufficient, which adversely affects the survival of fish due to lack of oxygen, or reduces the durability of the nets.

In particular, when cultivating yellowtail and yellowtail, spider worms attach to the fish and suck their blood, so the fish have a habit of rubbing them with fishing nets to remove them, but if Fujibbo is attached at that time,
A cut is made in the outer skin, and Pseudomonas enters the cut, causing a purulent disease that spreads and leads to mass mortality. Alternatively, with fixed nets, increased resistance to ocean currents may lead to poor net formation, and increased weight may cause difficulty in erection and hoisting. For this reason, fishing nets are used as an antifouling agent by soaking them in an antifouling agent mixed with highly toxic physical properties such as copper compounds or tin compounds, but the antifouling effect lasts for about 2 to 3 months. Therefore, it is necessary to regroup five to six times a year, and the cost, labor, and personnel costs are enormous, and these are also factors that put pressure on fishermen's management. It has become.

The present inventor has developed a fishing gear material that is effective in eliminating aquatic organisms, is harmless to fish, and has a stable antifouling effect for a long period of time, that is, 5 years or more. In order to develop this, we conducted intensive research. Metal powders with strong antifouling properties include tin, copper, lead, and zinc, but with single metal powders, it is not possible to control the elution amount of the antifouling active ingredient of each metal powder. , about 2~
It was also found that most of the antifouling active ingredients were eluted after three years, and the antifouling properties deteriorated after that. As a result of various experiments, the inventor of the tree further developed an alloy of two or more metals with strong stain resistance and mixed the alloy powder into a thermoplastic synthetic resin to improve its stain resistance. I found it. Based on these findings, the present inventor has repeatedly conducted research and discovered that an alloy powder of copper and zinc is most suitable as the two or more types of alloy powder.

The composition of copper and zinc is approximately as follows.

Copper 95-9'h%, preferably 97%, zinc 1-5%, preferably 3% by weight. Although alloy powders of other metals may be used, in consideration of cost and adaptability, alloy powders of copper and zinc, ie, copper alloys, are suitable. Hereinafter, it will be referred to as copper alloy.

In addition, the thermoplastic synthetic resins used include polyethylene resin, polyvinylidene chloride resin, polyester resin, polyamide resin, polypropylene resin, etc.
Of course, any other resin may be used as long as it retains the copper alloy, has corrosion resistance to seawater, and is compatible with drawn monofilament.

The fishing gear material of the present invention is produced by mixing copper alloy powder with strong antifouling properties into thermoplastic synthetic resin to produce drawn monofilament, and when applied to fishing nets, the antifouling activity is maintained for a long period of time. be able to. Since the antifouling active ingredient eluted from the copper alloy powder is controlled to an extremely small amount, there is almost no concern about fish toxicity or useful marine resources.

Based on the above-mentioned findings, the present inventor mixed copper alloy powder into a thermoplastic synthetic resin to produce a drawn monofilament composite material, thereby achieving superior properties that could not be obtained with conventional fishing nets. They discovered that it can be used as a fishing net and completed the present invention.

The main point of the present invention is to solve the above-mentioned requirements not by surface treatment but by the material itself.

The method of applying the fishing gear material of the present invention to fishing nets or ropes is approximately as follows. For example, copper alloy powder 5-25% by weight
, preferably 20% by weight, about 170-200%
Heated to "C" and kneaded with an extrusion screw, about 3 in diameter.
It is extruded into a rod shape of about fl, and after cooling, it is cut into a length of about 5H to produce pellets. This is reheated and kneaded using an extrusion screw, extruded into a string shape with a diameter of approximately 2 to 411n11, passed through a winding roll while cooling, and stretched while being heated again to 90 to 120"C. A drawn monofilament of about o, oso to 2.8 fins is produced.

This stretched monofilament is knitted into a net with an arbitrary number of twists depending on the size of the mesh of the fishing net. In addition, the ropes are twisted into one rope by twisting several ropes or tens of ropes according to the diameter, and then twisting three ropes to produce a rope of any diameter. The twisted yarn that forms fishing nets is also manufactured in the same way as the ropes.

Next, the present invention will be explained in more detail with reference to Examples. All percentages in each example are by weight.

(The following is a blank space) Example 1 A drawn monofilament having a diameter of about 0° and 15 mm was produced by mixing 10% copper alloy powder in a thermoplastic polyethylene resin. This was knitted with 30 threads and 80 twists. This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it, which was hung 1 to 3 m below the sea surface.

The test period was 60 months and began in early March.

The results were as follows.

Table 1 Example 2 A drawn monofilament having a diameter of about 0.15 Jlj+ was produced by mixing 15% copper alloy powder in a thermoplastic polyethylene resin. This was knitted with 8 tlff and 80 strands. This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it and it was hung 1 to 3 m below the sea surface. Test period tt'
It was held from the beginning of March. The results were as follows.

Table 2 Example 3 A drawn monofilament having a diameter of about 0.151 ffl was produced by mixing 20% copper alloy powder in a thermoplastic polyethylene resin. This was knitted with 30 threads and 80 twists. This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it and it was hung 1 to 3 m below the sea surface. The test period was 60 months and began in early March. The results were as shown below.

Table 3 Example 4 1 copper alloy powder was added to thermoplastic polyvinylidene chloride resin.
Drawn monofilaments with a diameter of about 0.15 mm were prepared with 0% blending. This was knitted with a mesh of 30 mts and 60 strands. This has a width of approximately 1.277i1. It was cut into lengths of about 2 meters, attached with weights, and hung 1 to 3 meters below the sea surface. The test period was 60 months and began in early March. The results were as shown below.

Table 4 Example 5 1 copper alloy powder was added to thermoplastic polyvinylidene chloride resin.
Drawn monofilaments with a diameter of approximately o, 15 tttm were prepared with a 5% blend. This was made into a fine mesh with 30 tomo and 60 wood twists. This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it and it was suspended 1 to 3 m below the sea surface. The test period was 60 months and began in early March. The results were as follows.

Table 5 Example 6 2 copper alloy powders were added to thermoplastic polyvinylidene chloride resin.
Drawn monofilaments of approximately 0.1 FII diameter with 0% blending were produced. This was knitted with 30 threads and 60 strands. This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it and it was hung 1 to 3 m below the sea surface. The test period was 60 months and began in early March. The results were as follows.

Table 6 Example 7 10% copper alloy powder mixed in thermoplastic polyester resin with a diameter of about 0.15 mm. A drawn monofilament of Iff was produced. This was knitted with 60 strands of mesh 3 (lr*). This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it and it was hung 1 to 3 m below the sea surface. Test The period is 60
It was held from early March. The results were as follows.

Table 7 Example 8 A drawn monofilament having a diameter of about 0.15 am was produced by mixing 15% copper alloy powder in a thermoplastic polyester resin. This was knitted with 30 tomo eyes and 60 wood twists. This was cut to about 1.2 m in width and 2 m in length, and hung with a weight 1 to 3 m below the sea surface. The test period was 60 months and began in early March. The results were as follows.

Table 8 Example 9 A drawn monofilament having a diameter of about Q, 15 mm was produced by mixing 20% copper alloy powder in a thermoplastic polyester resin. This was knitted with 30 threads and 60 strands. This was cut to a width of about 1.2J and a length of about 2m, and a weight was attached to the cutter to hang it 1 to 3m below the sea surface. The test period was 60 months and began in early March. The results were as follows.

Table 9 Example 10 A thick drawn monofilament with a diameter of about 2.8 mm was produced by mixing 10% copper alloy powder in a thermoplastic polyester resin. This was processed into a tortoise shell net with a mesh size of 40 mm, which was made into a size of about 1 m in width and about 2 m in length, and was suspended 1 to 3 m below the sea surface with a weight attached. The test period was 60 months and began in early March. The results were as follows.

Table 10 Example 11 A drawn monofilament with a diameter of about 2.8 mm was produced by mixing 15% copper alloy powder in a thermoplastic polyester resin. This was processed into a tortoiseshell net with a mesh size of 40 ffiare, which was made into a size of about 1 m in width and about 2 m in length, and was suspended 1 to 3 m below the sea surface with a weight attached. The test period was 60 months and began in early March. The results were as follows.

Table 11 Example 12 A thick drawn monofilament with a diameter of about 2.8 mm was produced by mixing 20% copper alloy powder in a thermoplastic polyester resin. This was processed into a tortoiseshell net with a 401-liter eyepiece, and this was made into a size of about 1 m in width and about 2 m in length, and was suspended 1 to 3 m below the sea surface with a weight attached. The test period was 60 months and began in early March. The results were as follows.

Table 12 Example 13 A drawn monofilament having a diameter of about 0.15ffff was produced by mixing 10% copper alloy powder in a thermoplastic polyamide resin. This was knitted with 30 threads and 60 strands.

This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it and it was hung 1 to 3 m below the sea surface. The test period was 60 months and started in late March. The results were as follows.

Table 13 Example 14 A drawn monofilament having a diameter of about o and t 5 srs was produced by mixing 15% copper alloy powder in a thermoplastic polyamide resin. This was knitted with 30 threads and 60 strands. This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it and it was hung 1 to 3 m below the sea surface. The test period was 60 months and began in early March. The results were as follows.

Table 14 Example 15 A drawn monofilament having a diameter of about 0.15 g was produced by mixing 20% copper alloy powder in a thermoplastic polyamide resin. This was knitted with 30 tomo eyes and 60 wood twists. This was cut to a width of about 1.2 ms and a length of about 2 m, and a weight was attached to it and it was hung 1 to 3 m below the sea surface. The test period will be 60 months,
I went there from early March. The results were as follows.

Table 15 Example 16 A thick drawn monofilament having a diameter of about 2.3 pttm was produced by mixing 10% copper alloy powder in a thermoplastic polyamide resin. This was processed into a tortoiseshell net with a mesh size of 40 Jff, which was made into a size of about 1 m in width and about 2 m in length, and was suspended 1 to 3 m below the sea surface with a weight attached. The exam period is 60
It was held from early March. The results were as follows.

Table 16 Example 17 15% copper alloy powder mixed in thermoplastic polyamide resin. A thick drawn monofilament of g IIIM was produced. This was processed into a tortoiseshell net with a mesh size of 40 mm, which was made into a size of about 1 m in width and about 2 m in length, and was suspended 1 to 3 m below the sea surface with a weight attached. The test period was 60 months and began in early March. The results were as follows.

Table 17 Example 18 A thick drawn monofilament having a diameter of about 2.8 MII was produced by mixing copper alloy powder with 2O2 in a thermoplastic polyamide resin. This was processed into a tortoiseshell net with a mesh size of 40 mm, which was made into a size of about 1 m in width and about 2 m in length, and was suspended 1 to 3 m below the sea surface with a weight attached. The test period was 60 months and began in early March. The results were as follows.

Table 18 Example 19 10% copper alloy powder in thermoplastic polypropylene resin
Mixed diameter approximately 0.15. A drawn monofilament of ws+ was produced. This was knitted with 3oIIrM mesh and 80 twists. This was cut to a width of about 1.2J and a length of about 2m, and a weight was attached to the cutter to hang it 1 to 3m below the sea surface. The exam period is 6
The study was conducted for 0 months, starting in early March. The results were as follows.

Table 19 Example 20 15% copper alloy powder in thermoplastic polypropylene resin
Mixed drawn monofilaments with a diameter of about 0.15 m were produced. This was knitted with 30 tomo eyes and 80 wood twists. This was cut to a width of about 1.2 m and a length of about 2 m, and a weight was attached to it and it was hung 1 to 3 m below the sea surface. The test period was 60 months and began in early March. The results were as follows.

Table 20 Example 21 20% copper alloy powder in thermoplastic polypropylene resin
Mixed drawn monofilaments of approximately 0.15 x m diameter were produced. This was knitted with 30 threads and 80 twists.

This has a width of approximately 1.2772. It was cut to a length of about 2 m, attached with a weight, and suspended 1 to 3 m below seawater. The test period was 60 months and began in early March. The results were as follows.

Table 21 As is clear from the above examples, the stain resistance improves as the amount of copper alloy powder mixed increases, but the stain resistance was approximately 1.8% over 12 months. The elution amount of single metal powders such as copper, zinc, and lead was about 3 to 3.5% over a 12-month period. It was also found that this difference greatly changes the durability of antifouling. Also, depending on the thermoplastic synthetic resin used, there are differences in strength due to differences in physical properties, so tests were conducted by changing the number of twists of the drawn monofilament, but there was no problem with stain resistance or strength. Understood. Moreover, no deterioration of physical properties was observed in seawater over a long period of time, and a fishing gear material with excellent antifouling properties and nontoxicity was obtained.

As described above, the fishing gear material of the present invention provides an innovative fishing gear material that meets the requirements for a fishing gear material.

Claims (2)

[Claims] (1) A fishing gear material made by mixing an alloy powder of two or more metals with strong antifouling properties with a thermoplastic synthetic resin. (2) The fishing gear material according to claim 1, which uses a copper alloy as an alloy of two or more metals with strong antifouling properties.